Debt (Components Of Debt) (Details) (USD $)			6 Months Ended			6 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Jul. 31, 2011	Jan. 31, 2011	Jul. 31, 2011 Convertible Senior Debentures [Member]	Jan. 31, 2011 Convertible Senior Debentures [Member]	Dec. 31, 2006 Convertible Senior Debentures [Member]	Jul. 31, 2011 Loan Payable To Brightstar Corporation, Interest At LIBOR Plus 4.0% Payable Annually, Due September 2015 [Member]	Jan. 31, 2011 Loan Payable To Brightstar Corporation, Interest At LIBOR Plus 4.0% Payable Annually, Due September 2015 [Member]	Jul. 31, 2011 Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2012 [Member]	Oct. 31, 2010 Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2012 [Member]	Jan. 31, 2011 Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2012 [Member]	Jul. 31, 2011 Interest-Free Revolving Credit Loan Payable To Brightstar Corporation [Member]	Jan. 31, 2011 Interest-Free Revolving Credit Loan Payable To Brightstar Corporation [Member]
Convertible senior debentures, face value			$ 350,000,000	$ 350,000,000	$ 350,000,000
Less-unamortized debt discount	(3,900,000)		(3,854,000)	(8,993,000)
Convertible senior debentures, net			346,146,000	341,007,000
Capital leases	7,434,000	7,325,000
Loan payable						15,964,000	15,203,000
Revolving credit loan								77,639,000		92,931,000	39,947,000	38,045,000
Long-term debt	487,130,000	494,511,000
Less-current maturities (included in "accrued expenses and other liabilities")	(424,320,000)	(434,435,000)
Total long-term debt	$ 62,810,000	$ 60,076,000
Convertible senior debentures, semi-annual interest rate			2.75%		2.75%
Annual interest rate on loans payable in addition to LIBOR						4.00%
Debt, maturity date			Dec. 01, 2026			Sep. 01, 2015
Revolving credit loans, interest rate								8.60%		3.27%
Revolving credit loans, expiration date									2012